For a real world reference, Eads Bridge took seven years to complete. Considering it spans the Mississippi River, though, it's of significantly greater length than Highbridge as depicted in FFXIV. Furthermore, design, planning, and construction of Eads Bridge was plagued with political and financial difficulties that stalled its construction for a time.
Highbridge likely took a couple of cycles (years) to complete. Maybe more, maybe less. I doubt it took the full five years post-Calamity, though, considering the local population that sprouted up around it. Those people seem to have been there some time as of the start of 2.0 (see: nearby buildings of Ul'dahn construction, etc.).
Highbridge likely took a couple of cycles (years) to complete. Maybe more, maybe less. I doubt it took the full five years post-Calamity, though, considering the local population that sprouted up around it. Those people seem to have been there some time as of the start of 2.0 (see: nearby buildings of Ul'dahn construction, etc.).